- Add documentation on how to run tests.

Configure Jest to mock svgs and css so that it doesn't throw syntax errors. This is also per recommendation in the Jest docs:
https://facebook.github.io/jest/docs/webpack.html

WIP getting a react test working. Throws syntax error on svgs so need to maybe configure jest to use existing webpack config instead which probably properly handles svgs.
- added additional plugins to get tests working

\o/ Successfully got hello world of jest working on windows (in windows cmd line). For some reason git bash doesn't work.

Fix library SVGs

This reverts commit 321839ca.

Asset load: use asset's data format, not default

Override callback for monitor checked state 

Show workspace before triggering resize

Check if blocks exists before updating values

Hide overflow-y on gui container

Update css-loader to the latest version 

Update style-loader to the latest version 

Update autoprefixer to the latest version 

Put letter blocks back at the end of the sprites list